Double point ignition set



J. T GREENE Feb. 14, 1939.

DOUBLE POINT IGNITION SET Filed Oct. 21, 1937 l I J4 Q/ESS Z reggggATTORNEYS Patented Feb. 14, 1939 2,147,198

UNITED STATES PATENT OFFICE DOUBLE POINT IGNITION SET Jesse T. Greene,Mllledgeville, Ga", assignor of one-half to Carl B. Massey,Milledgeville, Ga.

Application October 21, 1937, Serial No. 170,291 3 Claims. (Cl. 200-30)This invention relates to breaker point assempivot pin l5 which alsoextends through a conbly for internal combustion engine distributorstact mounting IS on which are secured relaand has for the primary objectthe provision of tively spaced contacts I! which cooperate with dual ordouble points and mountings therefor the contacts 8 in making andbreaking the 5 which will provide better engine performance electriccircuit of the distributor. A compound g with less consumption of fueland will possess curved spring i8 bears against the mounting i6 longerlife. and the contact arm I l. The spring will permit With these andother objects in view, this inthe mounting it to have a limited pivotalmovevention consists in certain novel features of conment on the pivotpin l5 so that the contacts I1 struction, combination and arrangement ofparts adjust themselves to the contacts 8. 10 to be hereinafter morefully described and In lieu of the mounting 3 the contacts 8 mayclaimed. be secured on a substantially U-shaped mounting For a completeunderstanding of myinvention, IS, the latter having slots 20 and anopening 2| reference is to be had to the following descripfor receivingstud bolts of a distributor housing tion and accompanying drawing, inwhich whereby the mounting l9 may be easily adjusted. 15

Figure l is a plan view, partly in section, and One end of the mountingl9 has an upstanding showing the dual or double points and mountingsflange on which the contacts 8 are mounted. therefor, constructed inaccordance with my in- The mounting l9 being adjustable on thehousvention. ing of the distributor permits the contacts 8 to Figure 2is a sectional view taken on the line be adjusted relative to thecontacts 11. 0 2-2 of Figure l. The use of dual or double points has adistinct Figure 3 is a fragmentary sectional view showadvantage over a.single point in a distributor in ing the dual contacts and the mountingstherefor. that when the single point becomes burned a very Figure 4 is aperspective view illustrating the weak current will be caused to passthrough the contact arm. points and consequently to the plugs, thereby25 Figure 5 is a perspective view illustrating the causing ineflicientoperation of the engine, exmounting for the pair of relatively fixedcontacts. cessive gas consumption and, in some instances, Figure 6 is aperspective view illustrating the will cause the engine to becomeinoperative. mounting for the pair of movable contacts. With the use ofthe double point the current is ure 7 S a Pe spective view illustratinga divided between the two pairs of points thereby 30 modified form ofmounting for the relatively fixed decreasing the current through eachpair of contacts. points which in turn reduces the possibility ofReferring in detail to the drawing, the nuburning of the points. In someinstances small meral I indicates a fragmentary portion of an foreignsubstances may come between the points internal combustion enginedistributor wherein causing them to hold open and should this occur 35the breaker arm cam is indicated by the charwith the double point asheretofore described in acter 2. Suitably secured in the distributor ithis application the spring and pivot action will is a mounting 3 n l inn ularly r la ed porallow the double points to operate withoutintertions 4 and 5, the portion 5 being secured on ruption.

the distributor I by stud bolts 8. The portion 4 w t is m n d i 40 hasscrew threaded openings to receive screw An interrupter for an ignitioncircuit, threaded E carrying bolts the 60mm prising a spaced parallelpair of like terminal thereof being indicated by the character Thecontact members, an intermittently operable inconmcts 8 may be adiu-stedon the mounting 3 terrupter arm in cooperative relation to said nd areheld in y their adjusted 190511510118 terminal contact members, arockable contact 45 y s t bolts 9 t r aded in Open n s l9 0! th mountingon said arm, resilient means for yieldm untlns 3 and tu n d against theontact arryably holding said mounting in a neutral position,

8 bolts and a spaced pair of like contact members located A contactarmll is pivotally mounted on the on said mounting respectively atopposite sides distributor and carries a button l2 which rides of thepivotal axis thereof whereby to have a 50 the cam 2 under the influenceof a spring ii, the compensating engagement with said first menlatteralso acting as an electrical conductor betioned terminal contactmembers. tween the distributor housing and the contacts 2. Aninterrupter for an ignition circuit, comcarried by the contact arm H.Spaced ears H prising a spaced parallel pair of like terminal are formedon the contact arm II and receive a contact members, means forindividually adjust- 55 ing said contact members longitudinally, anintermittently operable interrupter arm in cooperative relation to saidcontact members, a rockable mounting pivotally attached intermediate itsends to said interrupter arm, a compound curved spring elementinterposed between said mounting and said interrupter arm for holdingthe mounting in a normally neutral position, and a spaced pair ofcontact members located on said mounting respectively on opposite sidesof the pivotal axis thereof whereby to have a compensating engagementwith said first mentioned terminal contact members.

3. In an interrupter device oi the character described, a supportingbody,'a dual point circuit terminal comprising a spaced pair of contactmembers of like character and capacity, an intermittently operableinterrupter arm pivotally mounted and normally yieldably urged towardssaid terminal contact members, anda dual point opposed circuit terminalcarried by said interrupter arm and comprising a rockable mountinghaving an off-set pivotal attachment intermediate its ends to saidinterrupter arm with interposed compound curved spring element yieldablyholding the mounting in a. normally neutral position, and a pair ofcontact members of like character and capacity as first mentionedterminal contact members and located on said rockable mountingrespectively on opposite sides of the pivotal axis thereof whereby toengage said first mentioned terminal contact members with equalizingeffect.

JESSE T. GREENE.

